| 冷却速率对Cu49Hf42Al9金属玻璃热膨胀的影响 |
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| 引用本文： | 王莹莹,边秀房,贾然. 冷却速率对Cu49Hf42Al9金属玻璃热膨胀的影响[J]. 中国有色金属学会会刊, 2011, 21(9): 2031-2036. DOI: 10.1016/S1003-6326(11)60968-0 |
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| 作者姓名： | 王莹莹 边秀房 贾然 |
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| 作者单位： | 山东大学材料液固结构演变与加工教育部重点实验室; |
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| 基金项目： | Projects(50831003,50871062)supported by the National Natural Science Foundation of China; Project(Z2008F08)supported by the Natural Science Foundation of Shandong Province,China |
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| 摘 要： | 研究冷却速率对Cu49Hf42Al9金属玻璃热膨胀行为的影响.为了得到较大范围的冷却速率,制备了5种不同尺寸的非晶样品(冷却速率范围为102107 K/S).淬火态样品的平均热膨胀系数(αaver)分布于6.14×10-6 K-1至9.20×10-6 K-1之间.在玻璃转变温度(Tg以下时,淬火态样品的平均热膨胀系数(...
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| 关 键 词： | 金属玻璃 热膨胀 冷却速率 |
| 收稿时间： | 2010-09-28 |
Effects of cooling rate on thermal expansion of Cu_(49)Hf_(42)Al_9 metallic glass |
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| WANG Ying-ying,BIAN Xiu-fang,JIA Ran Key Laboratory of Liquid-Solid Structural Evolution , Processing of Materials of Ministry of Education,Sh,ong University,Ji'nan ,China. Effects of cooling rate on thermal expansion of Cu_(49)Hf_(42)Al_9 metallic glass[J]. Transactions of Nonferrous Metals Society of China, 2011, 21(9): 2031-2036. DOI: 10.1016/S1003-6326(11)60968-0 |
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| Authors: | WANG Ying-ying BIAN Xiu-fang JIA Ran Key Laboratory of Liquid-Solid Structural Evolution Processing of Materials of Ministry of Education Sh ong University Ji'nan China |
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| Affiliation: | WANG Ying-ying,BIAN Xiu-fang,JIA Ran Key Laboratory of Liquid-Solid Structural Evolution and Processing of Materials of Ministry of Education,Shandong University,Ji'nan 250061,China |
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| Abstract: | Effects of cooling rate on thermal expansion of Cu49Hf42Al9 metallic glass were studied. Five types of amorphous samples with different sizes were prepared in order to get a broad range of cooling rates （from 102 to 107 K/s）. The average thermal expansion coefficients （αaver） of as-quenched samples range from 6.14×10-6 to 9.20×10-6 K-1. When the temperature is below the glass transformation temperature （Tg）, αaver of as-quenched samples has a negative correlation with cooling rate; the values of αaver of annealed and crystallized samples are closed to each other. The results indicate that the amount and motion of free volume play important roles in thermal expansion of metallic glasses. |
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| Keywords: | metallic glass thermal expansion cooling rate |
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